Bosch Tech 2 User Manual

							Software
Te c h  2Page 8-31
•F3: Automatic Trigger (chassis applications only) automatically triggers a snapshot. 
Trigger Point (F4-F6 function keys) is the exact point at which the trouble code (fault) or manual 
trigger occurs within the snapshot period. It helps to know the trigger point when you are looking for 
changes in data parameters. Trigger point may be set for: 
•F4: Beginning causes the Tech 2 to start recording information from the trigger point until snapshot 
storage is full. This choice is useful if the fault is predictable in nature. 
•F5: Center is the most commonly used trigger point because it stores information leading up to and 
following the trigger point. This function allows comparison of events before, during, and after a 
fault. 
•F6: End sets the trigger point at the end of the snapshot recording and therefore shows only 
information leading up to and including the fault. 
7. Press the Record Snapshot soft key. The Tech 2 screen displays a flashing “standby” message. 
• When the fault occurs, press the Trigger soft key. 
• The Tech 2 displays the “triggered” message. 
• Allow the scan tool to record a sufficient amount of data, then press EXIT to store the snapshot data. 
• Press the Continue soft key when the snapshot trigger type screen is displayed. 
8. Exit to the Main Menu, then power down and disconnect the Tech 2 from the vehicle. 
UPLOADING THE SNAPSHOT TO THE PC 
After a snapshot has been successfully captured, perform the following steps to 
upload it from the scan tool to the computer: 
1. Start TIS 2000. 
2. Select Snapshot Upload from the TIS 2000 main screen (refer to Figure 8-18). 
3. Select the Snapshot Upload icon from the Tool Bar (the first icon in the toolbar). 
OR 
Select the Upload from Handheld box in the center of the screen (Figure 8-40). 
4. Select the appropriate scan tool and verify the Tech 2 connection to the terminal, then select OK 
(Figure 8-41). 
5. Select the snapshot to be uploaded, then select OK. 
After the snapshot uploads, a list of data parameters displays on the monitor (see Figure 8-42). 
						

							Software
Page 8-32Te c h  2
FIGURE 8-38. Snapshot Upload Screen Showing Two Choices
FIGURE 8-39. Upload from a Handheld Device Screen 
						

							Software
Te c h  2Page 8-33
FIGURE 8-40. Snapshot Display Showing Two-Column Mode
UploadOpenSingleTw oDiagnosticLock/SaveDisplayfrom
Handheld an
Existing Snapshot Column
Mode Column
Mode Trouble
Codes Graph Unlock
Parameters 
FirstReversePlay inTriggerPlayForwardLast Stop
Play  Frame One
Frame Forward Frame Reverse One
Frame Frame 
REPLAY SELECTIONS 
						

							Software
Page 8-34Te c h  2
VIEWING THE SNAPSHOT 
After a snapshot has been uploaded (either from disk or the scan tool), it can be viewed and analyzed in a 
variety of ways. Figure 8-42 identifies the different display icons and replay selections. 
REPLAYING THE SNAPSHOT 
To replay a snapshot, use the icons displayed as a row of selections in the lower left-hand portion of the 
screen. 
The selections and their functions are as follows (refer to Figure 8-42): 
• First Frame displays the first frame of the snapshot, regardless of which frame was displayed prior to 
selection. 
• Reverse One Frame moves the display to the frame immediately preceding the one currently displayed. 
• Play in Reverse causes the snapshot to continuously play in reverse, until the first frame is displayed. 
• Trigger Frame causes the display to move to the exact frame when the snapshot was triggered, 
regardless of which frame was displayed before the button was selected. 
• Play Forward causes the snapshot to continuously play forward until the last frame is reached. 
• Forward One Frame moves the snapshot forward to the next frame. 
• Last Frame takes the snapshot to the very last frame. 
• Stop Play causes a continuous play snapshot to stop at the frame when the button was selected. 
SINGLE-COLUMN VERSUS TWO-COLUMN DISPLAY 
The Two-Column and Single-Column icons in the toolbar change the appearance of 
data parameters. 
• Two-Column (see Figure 8-42) displays a double-list. When using two-column mode, the maximum 
number of characters of any one line is 80. 
• Single-Column (see Figure 8-43) lists data parameters in a single column that uses larger type, which 
makes the data easier to read at a distance. 
A default (Single or Two-Column mode) can be set by accessing Options from the menu bar.  
						

							Software
Te c h  2Page 8-35
DISPLAYING DIAGNOSTIC TROUBLE CODES 
The Diagnostic Trouble Code icon displays all relevant trouble code information for each individual frame 
of a snapshot. It is important to note that when replaying a snapshot, every frame of the snapshot may not 
have a stored DTC. 
To use the DTC display feature: 
1. Click on the DTC icon in the toolbar. 
A box appears near the top of the screen listing DTC information (Figure 8-44). The following 
information is provided: 
• The first line indicates how many codes are in the frame-for example, “1 of 2,” “2 of 2,” etc. This is 
not the total number of DTCs stored in the entire snapshot, just in the individual frame being 
displayed. 
FIGURE 8-41. Single Column Mode on Snapshot Upload Screen
FIGURE 8-42. DTC Information on Snapshot Upload Screen 
						

							Software
Page 8-36Te c h  2
• The number and name of the DTC. 
• “Diagnostic Test Status” states whether the test ran and whether it passed or failed. 
• “DTC Status” lists the DTC information. This is the status of the tests that were run and the related 
DTC messages that can be viewed by the technician. This information is based only on the DTC 
information listed, since some DTC information is not be available on all applications. 
2. If more than one DTC is set for a frame, scroll bars appear at the right side of the DTC window. To view 
other DTCs (Figure 8-45), click-and-drag the scroll box or use the scroll arrows. 
3. To determine exactly when a DTC set during a snapshot, use the Play Forward and Play in Reverse 
buttons to play the snapshot with the DTC window still in view. DTC information continues to display 
for all the frames during which the DTC was set. This information can be useful for diagnosing DTCs 
by displaying related data parameters at the point in time when the code was set. 
4. When a frame is reached for which there is no DTC, the message “No Diagnostic Troubles for this data 
frame” displays in the DTC window (Figure 8-46). 
TIP!
A quick way to see if a code was set during a snapshot is to go to the last 
frame of the snapshot, then select the DTC icon. This shows any and all 
DTCs set during the snapshot, since DTCs are stored for the duration of 
the snapshot. 
TIP!
In most snapshots, DTCs are set near the trigger frame. To quickly locate 
the frame where a DTC occurred, click on the “Trigger Frame” button. 
Then use the “Forward 1 Frame” or “Reverse 1 Frame” buttons to view the 
frames just before and after the trigger frame. Chances are, the DTC 
appears within these frames. If not, continue viewing the snapshot using 
the “Play Forward” or “Play in Reverse” button. 
FIGURE 8-43. Viewing DTC Codes on Snapshot Upload Screen 
						

							Software
Te c h  2Page 8-37
DISPLAYING GRAPHS 
A valuable function of snapshot display is the ability to view up to three data parameters in graph form. This 
allows you to see how a parameter is functioning over time. It also allows easy visual comparison of up to 
three parameters at a single time. 
To access Display Graph mode: 
1. Click on the Display Graph icon (Figure 8-47). 
A Graph Parameters window appears (Figure 8-48). 
2. Click on the first graph icon at the top of the graph parameters window, then select a parameter from 
the list in the lower portion of the box.
The parameter name appears next to the first graph icon (Figure 8-48). 
3. Repeat this procedure for the second and third graphs. 
4. When three desired parameters have been selected, select OK. 
The screen changes to display the chosen parameters in graph form (Figure 8-49). 
5. Using the navigation icons, move through the parameters. 
6. Click and drag on the arrow along the bottom of each graph to move through the graph (Figure 8-49). 
This arrow represents the current frame being viewed. It is useful for pinpointing precisely when a 
parameter change indicates a fault. 
A data value corresponding to the frame that the arrow is pointing to is displayed in the upper left 
corner of each graph. 
NOTEWhen selecting parameters to be graphed, consider the values used to 
measure the parameter to correctly plot these on the graphs. This is done in 
the Min Y Axis Value and Max Y Axis Value fields. These may need to be 
adjusted to reflect the normal range of values for the parameter—for 
example, 0 to 5 volts for MAP sensor.
FIGURE 8-44. “No Diagnostic Troubles” Message on DTC Window 
						

							Software
Page 8-38Te c h  2
7. To select a different parameter to be graphed, simply click and hold on the parameter name in the data 
list, then drag the cursor over one of the existing graphs and release the mouse button. 
The new parameter is graphed in place of the old one. 
8. To view a graph at full-screen size, move the cursor over the graph. When the cursor changes to a 
magnifying glass, click on the graph. 
The graph appears at full-screen size (Figure 8-50).
9. Single click on the full size graph to return to the three-graph display.
FIGURE 8-45. Display Graph Icon on Snapshot Upload Screen
FIGURE 8-46. Graph Parameters Window 
						

							Software
Te c h  2Page 8-39
LOCK/UNLOCK PARAMETERS 
The Lock/Unlock Parameters function is used to isolate specific parameters so they can be viewed and 
compared more easily than if they were part of the larger parameters list. 
To use the Lock/Unlock Parameters function: 
1. Click on the desired parameter to highlight it, then click on the Lock/Unlock Parameters icon (Figure 8-
51). 
The selected parameter appears at the top of the data list, above a “lock line” (Figure 8-52). 
2. To add other parameters, follow the same procedure. The “locked” parameters can then be viewed 
together to compare their data values. Parameters can also be locked by double-clicking on them in the 
data list. 
3. To remove an item from the locked list, select it, then click the Lock/Unlock icon. 
FIGURE 8-47. Three Parameters Shown in Graph Form
FIGURE 8-48. TP Sensor Parameter Shown in Full-Size Graph 
						

							Software
Page 8-40Te c h  2
The item is removed from the list. 
VIEWING CAPTURE INFO DATA 
Capture Info is a feature that allows the Tech 2 to retrieve DTCs, Freeze Frame, and Failure Records from 
the vehicles control module. This is a different function than snapshot display. Capture Info files consist of 
only one frame of data, whereas snapshots typically contain multiple frames of data. 
When Capture Info is selected, the scan tool displays a menu selection that allows data from the control 
module to be stored to the Tech 2 PCMCIA card, or to refresh the PCMCIA card with new data from a 
control module. 
Important: A single code may be counted as two different codes in a Capture Info. file if it exists both in 
freeze frame and failure records (Figure 8-54). 
To view DTCs, Freeze Frame, or Failure Record data through TIS 2000 software: 
1. Use the Tech 2 Capture Info function to retrieve data from a vehicles control module. 
2. Connect the Tech 2 to the computer (refer to Figure 8-20). 
3. Start TIS 2000. 
4. Select the Snapshot Upload application (refer to Figure 8-18). 
5. Click on the Upload from Hand-held icon from the toolbar (refer to Figure 8-40). 
6. Select Tech 2, then select OK. 
7. Select Capture Data from the upload selection menu, then select OK. 
The data is displayed on the screen (Figure 8-54). The top of the screen lists DTCs that were stored in 
the control module. The lower portion of the screen lists captured freeze frame or fail record data for the 
selected DTC. Notice that the navigation selections at the bottom of the screen are gray. This is because 
the data record consists of only one frame. 
8. If more than one DTC is present, selecting a DTC in the list changes the Data List to match that DTC. 
9. Capture Info can be stored and printed by the terminal. 
SAVING A SNAPSHOT TO DISK 
If youve opened a file and want to save it, choose the Save Snapshot icon from the toolbar (Figure 8-53). 
You have the option of saving the file to the terminals hard drive, to a floppy disk, or to the GM ACCESS 
file server. 
When saving a snapshot, the program automatically identifies the file by vehicle description. This 
information isnt always enough to describe the snapshot. 
TIP!
In addition to using each display option individually, they can be used in 
various combinations to provide the most useful diagnostic capability. It is 
even possible to view DTC information, locked parameters, and graphed 
parameters simultaneously (Figure 8-53). In multi-display mode, replay 
buttons can be used, as previously described, to move through the 
snapshot.